Let's get one thing straight—the graduated bob is that girl. An old maiden, Karen-type cut, she is not, but chic, low-maintenance, and forever in style. Nostalgic? Perhaps. Timeless? Absolutely!

Last year, the bob took over just about every red carpet, from twisted chin-length styles to shoulder-skimming ‘lobs’. This year, the cut shows no sign of loosening its grip on the beauty world, and ...